.\"	$OpenBSD: d2i_RSAPublicKey.3,v 1.13 2018/03/27 17:35:50 schwarze Exp $
.\"	OpenSSL bb9ad09e Jun 6 00:43:05 2016 -0400
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.\" Dr. Stephen Henson <steve@openssl.org>.
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.Dd $Mdocdate: March 27 2018 $
.Dt D2I_RSAPUBLICKEY 3
.Os
.Sh NAME
.Nm d2i_RSAPublicKey ,
.Nm i2d_RSAPublicKey ,
.Nm d2i_RSAPrivateKey ,
.Nm i2d_RSAPrivateKey ,
.Nm d2i_Netscape_RSA ,
.Nm i2d_Netscape_RSA ,
.Nm d2i_RSA_PSS_PARAMS ,
.Nm i2d_RSA_PSS_PARAMS ,
.Nm d2i_RSAPublicKey_bio ,
.Nm d2i_RSAPublicKey_fp ,
.Nm i2d_RSAPublicKey_bio ,
.Nm i2d_RSAPublicKey_fp ,
.Nm d2i_RSAPrivateKey_bio ,
.Nm d2i_RSAPrivateKey_fp ,
.Nm i2d_RSAPrivateKey_bio ,
.Nm i2d_RSAPrivateKey_fp ,
.Nm d2i_RSA_PUBKEY ,
.Nm i2d_RSA_PUBKEY ,
.Nm d2i_RSA_PUBKEY_bio ,
.Nm d2i_RSA_PUBKEY_fp ,
.Nm i2d_RSA_PUBKEY_bio ,
.Nm i2d_RSA_PUBKEY_fp
.Nd decode and encode RSA keys and parameters
.Sh SYNOPSIS
.In openssl/rsa.h
.Ft RSA *
.Fo d2i_RSAPublicKey
.Fa "RSA **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_RSAPublicKey
.Fa "RSA *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft RSA *
.Fo d2i_RSAPrivateKey
.Fa "RSA **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_RSAPrivateKey
.Fa "RSA *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft RSA *
.Fo d2i_Netscape_RSA
.Fa "RSA **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fa "int (*cb)()"
.Fc
.Ft int
.Fo i2d_Netscape_RSA
.Fa "RSA *val_in"
.Fa "unsigned char **der_out"
.Fa "int (*cb)()"
.Fc
.Ft RSA_PSS_PARAMS *
.Fo d2i_RSA_PSS_PARAMS
.Fa "RSA_PSS_PARAMS **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_RSA_PSS_PARAMS
.Fa "RSA_PSS_PARAMS *val_in"
.Fa "unsigned char **der_out"
.Fc
.In openssl/x509.h
.Ft RSA *
.Fo d2i_RSAPublicKey_bio
.Fa "BIO *in_bio"
.Fa "RSA **val_out"
.Fc
.Ft RSA *
.Fo d2i_RSAPublicKey_fp
.Fa "FILE *in_fp"
.Fa "RSA **val_out"
.Fc
.Ft int
.Fo i2d_RSAPublicKey_bio
.Fa "BIO *out_bio"
.Fa "RSA *val_in"
.Fc
.Ft int
.Fo i2d_RSAPublicKey_fp
.Fa "FILE *out_fp"
.Fa "RSA *val_in"
.Fc
.Ft RSA *
.Fo d2i_RSAPrivateKey_bio
.Fa "BIO *in_bio"
.Fa "RSA **val_out"
.Fc
.Ft RSA *
.Fo d2i_RSAPrivateKey_fp
.Fa "FILE *in_fp"
.Fa "RSA **val_out"
.Fc
.Ft int
.Fo i2d_RSAPrivateKey_bio
.Fa "BIO *out_bio"
.Fa "RSA *val_in"
.Fc
.Ft int
.Fo i2d_RSAPrivateKey_fp
.Fa "FILE *out_fp"
.Fa "RSA *val_in"
.Fc
.Ft RSA *
.Fo d2i_RSA_PUBKEY
.Fa "RSA **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_RSA_PUBKEY
.Fa "RSA *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft RSA *
.Fo d2i_RSA_PUBKEY_bio
.Fa "BIO *in_bio"
.Fa "RSA **val_out"
.Fc
.Ft RSA *
.Fo d2i_RSA_PUBKEY_fp
.Fa "FILE *in_fp"
.Fa "RSA **val_out"
.Fc
.Ft int
.Fo i2d_RSA_PUBKEY_bio
.Fa "BIO *out_bio"
.Fa "RSA *val_in"
.Fc
.Ft int
.Fo i2d_RSA_PUBKEY_fp
.Fa "FILE *out_fp"
.Fa "RSA *val_in"
.Fc
.Sh DESCRIPTION
These functions decode and encode RSA private and public keys.
For details about the semantics, examples, caveats, and bugs, see
.Xr ASN1_item_d2i 3 .
.Pp
.Fn d2i_RSAPublicKey
and
.Fn i2d_RSAPublicKey
decode and encode a PKCS#1
.Vt RSAPublicKey
structure defined in RFC 8017 appendix A.1.1.
.Fn d2i_RSAPublicKey_bio ,
.Fn d2i_RSAPublicKey_fp ,
.Fn i2d_RSAPublicKey_bio ,
and
.Fn i2d_RSAPublicKey_fp
are similar except that they decode or encode using a
.Vt BIO
or
.Vt FILE
pointer.
.Pp
.Fn d2i_RSAPrivateKey
and
.Fn i2d_RSAPrivateKey
decode and encode a PKCS#1
.Vt RSAPrivateKey
structure defined in RFC 8017 appendix A.1.2.
The
.Vt RSA
structure passed to the private key encoding functions should have
all the PKCS#1 private key components present.
The data encoded by the private key functions is unencrypted and
therefore offers no private key security.
.Fn d2i_RSAPrivateKey_bio ,
.Fn d2i_RSAPrivateKey_fp ,
.Fn i2d_RSAPrivateKey_bio ,
and
.Fn i2d_RSAPrivateKey_fp
are similar except that they decode or encode using a
.Vt BIO
or
.Vt FILE
pointer.
.Pp
.Fn d2i_Netscape_RSA
and
.Fn i2d_Netscape_RSA
decode and encode an RSA private key in NET format.
These functions are present to provide compatibility with
certain very old software.
The NET format has some severe security weaknesses and should be
avoided if possible.
.Pp
.Fn d2i_RSA_PSS_PARAMS
and
.Fn i2d_RSA_PSS_PARAMS
decode and encode a PKCS#1
.Vt RSASSA-PSS-params
structure defined in RFC 8017 appendix A.2.3 and documented in
.Xr RSA_PSS_PARAMS_new 3 .
.Pp
.Fn d2i_RSA_PUBKEY
and
.Fn i2d_RSA_PUBKEY
decode and encode an RSA public key using an ASN.1
.Vt SubjectPublicKeyInfo
structure defined in RFC 5280 section 4.1 and documented in
.Xr X509_PUBKEY_new 3 .
.Fn d2i_RSA_PUBKEY_bio ,
.Fn d2i_RSA_PUBKEY_fp ,
.Fn i2d_RSA_PUBKEY_bio ,
and
.Fn i2d_RSA_PUBKEY_fp
are similar except that they decode or encode using a
.Vt BIO
or
.Vt FILE
pointer.
.Sh RETURN VALUES
.Fn d2i_RSAPublicKey ,
.Fn d2i_RSAPublicKey_bio ,
.Fn d2i_RSAPublicKey_fp ,
.Fn d2i_RSAPrivateKey ,
.Fn d2i_RSAPrivateKey_bio ,
.Fn d2i_RSAPrivateKey_fp ,
.Fn d2i_Netscape_RSA ,
.Fn d2i_RSA_PUBKEY ,
.Fn d2i_RSA_PUBKEY_bio ,
and
.Fn d2i_RSA_PUBKEY_fp
return a valid
.Vt RSA
object or
.Dv NULL
if an error occurs.
.Pp
.Fn d2i_RSA_PSS_PARAMS
returns a valid
.Vt RSA_PSS_PARAMS
object or
.Dv NULL
if an error occurs.
.Pp
.Fn i2d_RSAPublicKey ,
.Fn i2d_RSAPrivateKey ,
.Fn i2d_Netscape_RSA ,
.Fn i2d_RSA_PSS_PARAMS ,
and
.Fn i2d_RSA_PUBKEY
return the number of bytes successfully encoded or a negative value
if an error occurs.
.Pp
.Fn i2d_RSAPublicKey_bio ,
.Fn i2d_RSAPublicKey_fp ,
.Fn i2d_RSAPrivateKey_bio ,
.Fn i2d_RSAPrivateKey_fp ,
.Fn i2d_RSA_PUBKEY_bio ,
and
.Fn i2d_RSA_PUBKEY_fp
return 1 for success or 0 if an error occurs.
.Sh SEE ALSO
.Xr ASN1_item_d2i 3 ,
.Xr EVP_PKEY_set1_RSA 3 ,
.Xr PEM_write_RSAPrivateKey 3 ,
.Xr RSA_new 3 ,
.Xr RSA_PSS_PARAMS_new 3 ,
.Xr X509_PUBKEY_new 3
.Sh STANDARDS
RFC 8017: PKCS #1: RSA Cryptography Specifications
.Pp
RFC 5280: Internet X.509 Public Key Infrastructure Certificate and
Certificate Revocation List (CRL) Profile,
section 4.1: Basic Certificate Fields
.Sh HISTORY
.Fn d2i_RSAPublicKey ,
.Fn i2d_RSAPublicKey ,
.Fn d2i_RSAPrivateKey ,
.Fn i2d_RSAPrivateKey ,
.Fn d2i_RSAPrivateKey_fp ,
.Fn i2d_RSAPrivateKey_fp ,
.Fn d2i_Netscape_RSA ,
and
.Fn i2d_Netscape_RSA
first appeared in SSLeay 0.5.1.
.Fn d2i_RSAPrivateKey_bio
and
.Fn i2d_RSAPrivateKey_bio
first appeared in SSLeay 0.6.0.
.Fn d2i_RSAPublicKey_bio ,
.Fn d2i_RSAPublicKey_fp ,
.Fn i2d_RSAPublicKey_bio ,
and
.Fn i2d_RSAPublicKey_fp
first appeared in SSLeay 0.8.1.
These functions have been available since
.Ox 2.4 .
.Pp
.Fn d2i_RSA_PUBKEY ,
.Fn i2d_RSA_PUBKEY ,
.Fn d2i_RSA_PUBKEY_bio ,
.Fn d2i_RSA_PUBKEY_fp ,
.Fn i2d_RSA_PUBKEY_bio ,
and
.Fn i2d_RSA_PUBKEY_fp
first appeared in OpenSSL 0.9.5 and have been available since
.Ox 2.7 .
.Pp
.Fn d2i_RSA_PSS_PARAMS
and
.Fn i2d_RSA_PSS_PARAMS
first appeared in OpenSSL 1.0.1 and have been available since
.Ox 5.3 .
